public class Calculator {

    private static int result;

    public void add(int n){
        result=result+n;
    }
    public void substract(int n){
        result=result-n;
    }
    public int getResult(){
        return result;
    }

    public void clear() {
        result=0;
    }
    public void multiply(int n){
        result=result*n;
    }
    public void divide(int n){
        result=result/n;
    }
    public void square(){
        result=result*result;
    }
}
